Ammonium perchlorate (AP)‐based solid rocket propellants generate hydrochloric acid (HCl) as an exhaust product during combustion. This latter displays numerous environmental problems such as the depletion of the ozone layer and the increase of the concentration of acid rains. This paper offers a theoretical analysis concerning the employment of metal hydrides as efficient additives to mitigate some of the negative effects of HCl on the environment during the combustion of AP‐based composite propellants. Nine complex metal hydrides, expected to generate desirable performance gains, are selected to assess their scavenging effect on the HCl during propellant combustion. Based on NASA Lewis Code, Chemical Equilibrium with Application (CEA), comparative analysis of the theoretical performance of specific impulse, adiabatic flame temperatures, condensed combustion products as well as the exhaust gaseous species has been carried out. This study reveals that complex metal hydrides‐based propellants exhibited better performance than those containing simple metal hydrides, showing a synergetic effect of high specific impulse and low environmental impact. It is consequently anticipated that a good choice of metal hydride can provide clean/green propellant formulations that can satisfy the current environmental requirements with better performance than current aluminum propellants.

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复杂金属氢化物对高性能复合固体推进剂中盐酸排出物消除的影响：理论分析

基于高氯酸铵（AP）的固体火箭推进剂在燃烧过程中会生成盐酸（HCl）作为废气。后者显示出许多环境问题，例如臭氧层的消耗和酸雨浓度的增加。本文提供了有关使用金属氢化物作为有效添加剂来减轻AP基复合推进剂燃烧过程中HCl对环境的负面影响的理论分析。选择了有望产生理想性能提升的九种复合金属氢化物，以评估其在推进剂燃烧过程中对HCl的清除效果。根据美国国家航空航天局（NASA）Lewis准则，应用化学平衡（CEA），对特定脉冲，绝热火焰温度，已经进行了冷凝的燃烧产物以及废气的种类。这项研究表明，基于复杂金属氢化物的推进剂比包含简单金属氢化物的推进剂具有更好的性能，显示出高比冲和低环境影响的协同效应。因此，预期金属氢化物的良好选择可以提供清洁/绿色的推进剂配方，该配方可以满足当前的环境要求并具有比目前的铝推进剂更好的性能。